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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!nntp.coast.net!news-res.gsl.net!news.gsl.net!news.mathworks.com!newsfeed.internetmci.com!news.ac.net!news.bconnex.net!news.abs.net!cs.umd.edu!info.usuhs.mil!hq.hq.af.mil!news From: sgregory@pubspo.hq.af.mil (Scott Gregory) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Mail......What does this mean?? Date: Fri, 12 Jul 1996 16:53:20 GMT Organization: Departmental Publishing Lines: 21 Message-ID: <31e6811d.21963902@news.hq.af.mil> NNTP-Posting-Host: sgregory.hq.af.mil X-Newsreader: Forte Agent .99d/32.182 Three lines like this (names have been changed to protect the guilty :-) ) appeared in my /var/log/maillog. Jul 12 10:38:43 my.sys.name sendmail[17654]: foo.bar [123.123.123.123]: vrfy lhammer Each entry had a different last word (I assume this is a username?). What does this mean?? I know date, time, sys name, log entry, offending system, translated address, but what are they doing with "vrfy lhammer" Is this a security concern?? I'm STILL new at this so please explain in detail. Thanks, C-ya Scott